v1.4.4

source/base/StarDirectoryAssetSource.cpp

@@ -0,0 +1,96 @@
+#include "StarDirectoryAssetSource.hpp"
+#include "StarFile.hpp"
+#include "StarJsonExtra.hpp"
+
+namespace Star {
+
+DirectoryAssetSource::DirectoryAssetSource(String const& baseDirectory, StringList const& ignorePatterns) {
+  m_baseDirectory = baseDirectory;
+  m_ignorePatterns = ignorePatterns;
+
+  // Load metadata from either /_metadata or /.metadata, in that order.
+  for (auto fileName : {"/_metadata", "/.metadata"}) {
+    String metadataFile = toFilesystem(fileName);
+    if (File::isFile(metadataFile)) {
+      try {
+        m_metadataFile = String(fileName);
+        m_metadata = Json::parseJson(File::readFileString(metadataFile)).toObject();
+        break;
+      } catch (JsonException const& e) {
+        throw AssetSourceException(strf("Could not load metadata file '%s' from assets", metadataFile), e);
+      }
+    }
+  }
+
+  // Don't scan metadata files
+  m_ignorePatterns.append("^/_metadata$");
+  m_ignorePatterns.append("^/\\.metadata$");
+
+  scanAll("/", m_assetPaths);
+
+  m_assetPaths.sort();
+}
+
+JsonObject DirectoryAssetSource::metadata() const {
+  return m_metadata;
+}
+
+StringList DirectoryAssetSource::assetPaths() const {
+  return m_assetPaths;
+}
+
+IODevicePtr DirectoryAssetSource::open(String const& path) {
+  auto file = make_shared<File>(toFilesystem(path));
+  file->open(IOMode::Read);
+  return file;
+}
+
+ByteArray DirectoryAssetSource::read(String const& path) {
+  auto device = open(path);
+  return device->readBytes(device->size());
+}
+
+String DirectoryAssetSource::toFilesystem(String const& path) const {
+  if (!path.beginsWith("/"))
+    throw AssetSourceException::format("Asset path '%s' must be absolute in DirectoryAssetSource::toFilesystem", path);
+  else
+    return File::relativeTo(m_baseDirectory, File::convertDirSeparators(path.substr(1)));
+}
+
+void DirectoryAssetSource::setMetadata(JsonObject metadata) {
+  if (metadata != m_metadata) {
+    if (!m_metadataFile)
+      m_metadataFile = String("/_metadata");
+
+    m_metadata = move(metadata);
+
+    if (m_metadata.empty())
+      File::remove(toFilesystem(*m_metadataFile));
+    else
+      File::writeFile(Json(m_metadata).printJson(2, true), toFilesystem(*m_metadataFile));
+  }
+}
+
+void DirectoryAssetSource::scanAll(String const& assetDirectory, StringList& output) const {
+  auto shouldIgnore = [this](String const& assetPath) {
+    for (auto const& pattern : m_ignorePatterns) {
+      if (assetPath.regexMatch(pattern, false, false))
+        return true;
+    }
+    return false;
+  };
+
+  // path must be passed in including the trailing '/'
+  String fsDirectory = toFilesystem(assetDirectory);
+  for (auto entry : File::dirList(fsDirectory)) {
+    String assetPath = assetDirectory + entry.first;
+    if (entry.second) {
+      scanAll(assetPath + "/", output);
+    } else {
+      if (!shouldIgnore(assetPath))
+        output.append(move(assetPath));
+    }
+  }
+}
+
+}